Suggest Remedy For Insomnia And Fatigue While On Levothyroxine

Him 57 and been sick for 20 something years. Pain everywhere nothing helps. But recently I was given a thyrios tsh test. Finally. And my tsh was 7.57. Dr put on levothyroxine 50. Daid come back in three months for test again. Its been little over 2 months now and I dont feel anything. No better. my fatique is horrible and insomnia. I told him I geeky worse after starting after two weeks he says doswnt think its the meds but dint check. Im not due in until oct 21 which wil be there months. I feel like I should have been feeling some thing by now and he should have helped my levels before the 3 months. What do you think. Hes a reg dr. Should I go to a specialist for thyriod or not? Should he have checked my t 3 also ?? I feel like im dying slowly..